Bioballs are best used out of water with water trickling
over them. They do work under water, but do their best
work out of water with water trickling over them.

For reef tank, just use live rock and live sand filtering,
and a protein skimmer.

Wayne Sallee
Wayne's Pets



Cindy wrote on 5/10/2006 11:57 PM:
Will bioballs work in a power filter, or do they have to have a wet/dry?

Cindy